JPH0866313A - Coffee pot, and coffee pot heat adjustment frame - Google Patents

Abstract

PURPOSE: To provide a coffee pot in which partial overheat is avoided, in which concentration of liquid is restricted, and in which delicious coffee of excellent taste and flavor can be provided. CONSTITUTION: A coffee pot 1 has a far infrared radiation layer 2 as the innermost layer, and a far infrared reflection layer 3 and a heat insulation material layer 4 formed in order at a side surface outer part. A coffee pot heat adjusting frame 12 is laid between a bottom surface of the coffee pot 1 and a heater 11, so the frame 12 is deformed from a flat form to lift the pot 1 by temperature rise.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel coffee pot and a heating adjustment stand interposed between the pot and the heater. More specifically, heat radiation cooling from the outer surface of the coffee pot, high temperature heating from the bottom of the coffee pot to compensate for it, concentration of coffee due to long-term heating and other operations and phenomena that cause deterioration of coffee taste are possible. The present invention relates to a coffee pot that can be avoided, has a good taste and aroma, and can provide delicious coffee, and a pedestal used for heating the coffee pot.

[0002]

2. Description of the Related Art Coffee is obtained by drying and roasting coffee beans (seed from which the kernel skin has been removed) taken from a plant of the cocoa genus Rubiaceae, contacting it with hot water at about 90 ° C. It is a favorite beverage in which flavor and scent components are extracted, and is favored by many people. This coffee is a habitual favorite beverage, so it is important to always boil it to the same taste. Delicious coffee has a high scent, the resulting one has no turbidity, and has a mellow flavor and richness.
It is said that the aftertaste is light. To brew such delicious coffee, use freshly roasted and freshly brewed coffee beans, avoid hard water, always use boiling water, and keep the temperature of the hot water in contact with the coffee ingredients at 90 It is said that around ℃ is good. When coffee is boiled excessively, the body and aroma are deteriorated, substances other than the desired soluble components are dissolved, and the bitterness becomes stronger. Therefore, to boil delicious coffee, this overcooking is not preferable, and the extraction-filtration method by moderate heating is preferable.

Examples of equipment for boiling coffee include (1) hand grip type, (2) siphon type,
(3) There are percolator types, but among these, the handgrip type of (1) can extract the best taste of coffee, and in particular, the equipment with a filter of filter paper is easy to operate. , Used in many households. The preferred temperature for coffee is usually (body temperature +
It is said to be around 35 ° C), and therefore around 70 ° C. However, about 10 to 15 ° C decreases when liquid is supplied from the pot to the cup or when milk or the like is added. Therefore, it is said that a table temperature of about 80 ° C is preferable, and therefore, the above (1) In the case of using the hand-grip type device, the coffee for the table in the pot that has passed through the filter is usually heated from the bottom of the coffee pot in an attempt to maintain the temperature at around 80 ° C.

However, in the conventional coffee pot, the radiation cooling from the side surface is intense and the temperature distribution in the pot is apt to widen. Therefore, it is unavoidable to keep the average temperature of the entire pot at a proper temperature. There was no choice but to superheat the liquid temperature of the contact part (lower part) with the above-mentioned suitable coffee heating temperature. In addition, since it is difficult to control the amount of heat generated by a nichrome wire heating heater that is usually used, the range between the maximum heating temperature and the minimum heating temperature is wide, and a high temperature overheat state is likely to occur. The partial overheating of the coffee in the pot causes oxidative deterioration of the coffee extract component, and further causes the deterioration of the component due to the concentration of the coffee liquor, resulting in the disadvantage that the taste and aroma of the coffee are unavoidably deteriorated. there were.

By the way, in recent years, a heating system and a heat retaining system using a far-infrared emitting material have been attracting attention and have been put to practical use in many fields. Infrared rays are electromagnetic waves like visible rays and microwaves, and are classified into three types of near infrared rays, mid infrared rays, and far infrared rays depending on the wavelength, and among them, far infrared rays indicate a region of 3 to 1,000 μm. This far-infrared ray is absorbed by the object to be heated through the space, excites molecular vibrations, lattice vibrations, etc., and immediately becomes heat, which causes the temperature of the object to be heated to rise. In particular, when used for heating or drying resins, rubbers, fibers, foods, etc., many have absorption wavelengths in the wavelength region of 3 to 30 μm, and radiators with high emissivity in this wavelength region are used for heating and drying. It is effective in increasing the drying efficiency. As such a far-infrared radiation material, for example, various ceramic materials such as alumina, graphite and zirconia are known, and recently, a material made of an aluminum alloy having an anodized film formed on the surface thereof has been proposed. (Japanese Patent Laid-Open No. 4-110493).

[0006]

DISCLOSURE OF THE INVENTION The present invention is necessary for suppressing heat radiation from the outer surface (side surface, lid portion and bottom surface) of coffee stored in a coffee pot as much as possible and maintaining an appropriate temperature for the entire coffee. By suppressing overheating from the bottom of the coffee pot, it suppresses quality deterioration due to local high-temperature oxidation or evaporative concentration of coffee due to overheating from the bottom of the coffee pot, and provides delicious and tasty coffee. The purpose of the present invention is to provide a novel coffee pot that can be used and an adjusting device for heating the coffee pot.

[0007]

As a result of earnest studies to develop a coffee pot having the above-mentioned preferable function, the present inventor has focused on a heating method using far infrared rays, and has been developed to a far side of the coffee pot. The infrared radiator layer is the innermost layer, and the far-infrared reflection layer and the heat insulating material layer are sequentially provided to reduce heating from the bottom as much as possible, and receive far-infrared radiation from the side surface to store in the pot. It has been found that it is possible to maintain the proper temperature of the brewed coffee and prevent partial overheating. Further, a metal plate having a bimetal plate portion formed by laminating two kinds of metal plates having different thermal expansion coefficients is interposed between the bottom surface of the coffee pot and the heater on the bottom surface side, and when the temperature reaches a desired temperature, the bimetal plate is It was found that by deforming and lifting the coffee pot and forming an air layer between the heater and the coffee pot, coffee overheating can be suppressed and the liquid is hardly concentrated, and a coffee with a good taste and aroma can be obtained. The present invention has been completed based on such findings.

That is, the gist of the present invention is (1) a coffee pot having a far-infrared radiator layer as an inner layer and a far-infrared reflecting layer and a heat insulating material layer sequentially provided on the outside of the side surface. (Second) Outside the side surface, a far-infrared radiator layer as an inner layer, a far-infrared reflecting layer and a heat insulating material layer are sequentially provided, and an exterior part is provided,
The far infrared radiator layer is a coffee pot that extends all over the bottom surface. (3) The coffee pot according to the above 1st or 2nd, wherein the far-infrared radiation layer is made of a far-infrared radiation material made of an aluminum alloy having an anodized film on at least its inner surface. (Fourth) The coffee pot according to the first or second aspect, wherein an aluminum foil is used for the far infrared reflection layer. (Fifth) The coffee pot according to the first or second, wherein the far-infrared reflecting layer is provided on the inner surface of the lid. (Sixth) The coffee according to the first or second aspect, wherein a cut for confirming the liquid level in the pot is provided in a part of the exterior part made up of the far-infrared radiator layer, the far-infrared reflecting layer and the heat insulating material layer. pot. (Seventh) A gantry interposed between the coffee pot according to any one of the first to sixth aspects and a heater on which the coffee pot is mounted is a metal disc having a uniform coefficient of thermal expansion, and its outer periphery. A coffee pot, which is a plate-shaped body composed of an annular plate formed of a bimetal plate composed of a laminated plate of two kinds of metals having different thermal expansion coefficients, which are integrated via an annular heat insulating material formed in A stand for heating adjustment.

The contents of the present invention will be described in detail below. The coffee pot according to the present invention has a far-infrared radiator layer as an innermost layer on the outside of its side surface, and has an exterior portion in which a far-infrared reflection layer and a heat insulating material layer are sequentially provided in an outward direction. In addition, the far-infrared radiator layer of the exterior part has a heating layer extending so as to cover the entire bottom surface of the pot. Here, the far infrared radiation material used for the far infrared radiation layer is not particularly limited, conventionally known ones,
For example, a ceramic material such as alumina, graphite, or zirconia, a material obtained by spraying a ceramic on the surface of a metal base material, or an aluminum or aluminum alloy having an anodized film on at least the inner surface can be used. Among these, in terms of workability, heat resistance, far-infrared radiation characteristics, durability and lightness, Japanese Patent Laid-Open No. 4-11
An aluminum alloy having an anodized film on the surface described in JP-A-0493 is particularly suitable.

This aluminum alloy has a Mn of 0.3 to 4.
An alloy containing 3% by weight and the balance being Al and unavoidable impurities. As the impurity elements, Fe: less than 0.5% by weight, Si: less than 0.5% by weight, Cr: less than 0.3% by weight, Zr: less than 0.3% by weight, V: less than 0.3% by weight. , N
i: less than 1% by weight, Cu: less than 1% by weight, Zn: less than 1% by weight, Ti: less than 0.2% by weight, Bi: less than 0.05% by weight, Be: less than 0.05% by weight, or You may contain 2 or more types.

The far infrared emitting material used in the present invention is
After casting the aluminum alloy having the above composition, or after hot working performed as necessary, or during or after cold working performed as necessary, 300 to 600 ° C.
Was heat-treated in order to disperse and precipitate particles of an intermetallic compound having a composition of Al and Mn, or to use it as a base material, and form a black anodic oxide film with a thickness of 10 μm or more on the surface of the base material. It is a thing.

[0012] Such a far-infrared radiation material emits far-infrared radiation at a high emissivity when it receives heat, and raises the temperature of the object to be radiated. Therefore, if a layer made of this far-infrared radiation material is provided on the side surface of the pot, the far-infrared radiation material layer is directly or indirectly heated by heating the heater from the bottom surface of the pot to radiate far-infrared rays. Heat is applied to prevent heat radiation from the side surface. Moreover, the degree of heating is not as intense as the heating by a heater.

In another coffee pot disclosed by the present invention, the far-infrared radiation material layer forming the innermost surface of the exterior portion is extended to the entire outer surface of the pot bottom portion, and is heated by a heater from the bottom surface. In that case, it has no effect, but as will be described later, when a pedestal using a bimetal plate is interposed between the coffee pot and the heater and heated, the bimetal functions at a predetermined temperature and the pedestal acts as a coffee pot. Effective when lifted stably. That is, the bottom of the coffee pot is away from the heater,
Although it goes toward radiative cooling, the original purpose of using the gantry is to prevent overheating, not to cool the pot. The far-infrared radiation material covering the bottom of the pot according to the present invention exerts a gentle heating function for preventing the radiation cooling. By this action, neither overheat from the bottom of the pot nor radiative cooling is prevented, and the coffee can be kept in a predetermined temperature range. This layer is made of an aluminum alloy, and its presence does not hinder the heating of the pot by the heater.

In order to efficiently irradiate and utilize the far infrared rays emitted from the far infrared radiator layer on the side surface of the coffee pot according to the present invention, the far infrared reflecting layer is provided on the outer surface of the far infrared radiator layer. Is provided. The material used for this reflective layer is not particularly limited, but aluminum foil is preferably used because of its demand for high far-infrared reflectance, light weight and thinness, and of course inexpensiveness. .

In the present invention, a heat insulating material layer is provided on the outer surface of the far infrared reflecting layer. The purpose is to suppress the scattering of heat generated by far-infrared radiation. There is no particular limitation on the material used for this heat insulating material layer,
Conventionally known materials such as polyethylene, vinyl chloride-vinyl acetate copolymer, polyurethane, foamed plastics such as phenol resin, and glass fiber, which is a non-combustible material, can be used. A decorative cover made of plastic or metal is preferably provided on the outer surface of the heat insulating material layer.

In the coffee pot of the present invention, the far-infrared radiator layer (side surface and bottom surface), the far-infrared reflective layer and the heat insulating material layer are usually 0.15 to 2.0 mm in thickness and 0.1 mm in thickness, respectively.
It is formed in the range of about 01 to 0.1 mm and about 0.5 to 5.0 mm.

The lid of the coffee pot is usually made of a synthetic resin having heat resistance and low thermal conductivity, and attempts to prevent radiative cooling as much as possible. Heat dissipation makes it difficult to maintain the coffee temperature. In the present invention, the far-infrared reflecting layer is provided on the back side of the lid, that is, on the coffee side, and far-infrared rays emitted from the far-infrared radiator layer on the side surface or the bottom surface of the pot are not escaped and reflected in the pot to make the coffee. It exerts the function of gentle heating.

The present invention further relates to a gantry interposed between the coffee pot and the heater, wherein when the heater temperature reaches a predetermined temperature, a bimetal function is activated to lift the pot and separate it from the upper surface of the heater. Provide a stand to prevent the coffee temperature from overheating. This pedestal is composed of a central metal disc and a metal annular plate formed on the periphery thereof with an annular heat insulating material. The metal of the central metal disc is not particularly limited. It is preferable to use a material that has good conductivity and does not warp due to heating. Usually, a material having a uniform coefficient of thermal expansion such as aluminum, copper, iron, and stainless is used.

The peripheral metal annular plates have different thermal expansion coefficients.
It is composed of a laminated plate composed of one metal plate, and when a predetermined temperature is reached, the outer circumference or the inner circumference is deformed due to the difference in the coefficient of thermal expansion between the two metal plates. This feature lifts the pot away from the heater. The metal forming the bimetal is not particularly limited as long as it is two kinds of metal plates that are usually used and have different thermal expansion coefficients, but a combination of copper alloy / amber (nickel steel) is generally used.

A heat insulating portion is formed by a ring-shaped heat insulating material between the central metal circular plate and the peripheral metal annular plate to block heat transfer between the two. The purpose of this shutoff is, in the case where the central metal disc or the peripheral metal annular plate is lifted, the influence of the heating received by the portion that is not lifted and is in contact with the heater extends to the lifted portion, This is because if it is heated, the pot is also heated, and the function of the gantry becomes meaningless. The material used for the annular heat insulating portion is not particularly limited, but it is natural that heat insulating properties and heat resistance are required, and inorganic fibers, foamed ceramics and the like are suitable.

The present invention will be described below with reference to the drawings. FIG. 1 is a vertical cut end view showing an example of a state in which a coffee pot 1 of the present invention is placed on a heater 11. A part 2a of the far-infrared radiator layer 2 is formed on the outer surface of the side surface of the coffee pot 1.
The far infrared ray reflection layer 3 and the heat insulating material layer 4 are sequentially provided on the outer side thereof, and a decorative cover 5 is provided on the outer surface of the heat insulating material layer 4 to form the exterior portion 6. There is. On the outer surface of the bottom of the coffee pot 1, a part 2b of the far-infrared radiation layer 2 extends from the 2a and covers the entire surface. The far-infrared radiator layer 2b is the heater 11
Is in full contact with. The coffee pot has a mouth portion 7 at the top, and a lid body 8 having an air vent hole 8a is placed at the mouth portion, and a far infrared reflection layer 9 is laminated on the back surface (inside the pot) of the lid body. Has been done. An air vent hole 9a is formed in the far-infrared reflecting layer 9 in conformity with the lid. A handle 10 is provided on the side surface of the coffee pot.

FIG. 2 is a plan view of an example of the gantry 12 according to the present invention, which is composed of a central metallic disc portion B, a peripheral metallic annular plate portion A, and an annular heat insulating portion C interposed therebetween. The peripheral metal annular plate portion A is composed of two kinds of metal laminated plates having different thermal expansion coefficients. FIG. 3 is an end view when cut along the central axis of FIG. 2, and shows a case where the heater 11 is placed on the heater 11. A metallic disc portion B is provided at the center, a metallic annular plate portion A is provided at the periphery, and an annular heat insulating portion C is interposed therebetween. In addition, the metal annular plate portion A has a bimetal structure, which is a laminated body of two kinds of upper and lower metals on the periphery.

FIGS. 4 and 5 show a state in which the bimetal structure portion is deformed when the temperature of the heater is raised, and the former part has the central B part and the latter part has the peripheral A part. In the case of FIG. 4, a part of the periphery A, and the part of the center B in FIG. 5 are in contact with the heater, but the heat of the heater supports the coffee pot by the annular heat insulating portion C. B part (Fig. 4) or surrounding A part (Fig. 5)
Has the merit that is hardly transmitted.

FIG. 6 shows a cut 13 for confirming the liquid surface position in the pot in a part of the exterior portion 6 formed of the far infrared radiator layer, the far infrared reflection layer and the heat insulating material layer in the coffee pot 1 of the present invention. It shows a state in which is provided. The size of the cut is not particularly limited as long as the liquid surface can be confirmed. A lid is placed on the mouth 7, but it is not shown in FIG. The coffee pot 1 of the present invention
As the material of the main body, transparent heat resistant glass is usually used.

[0025]

Next, the present invention will be described in more detail with reference to examples. Examples 1 to 7 and Comparative Examples 1 to 3 Body part diameter 109 mm, internal volume of 1,000 ml, 0.8 mm thickness outside the side surface of a coffee pot made of heat-resistant glass
The inner layer is a far-infrared radiator layer made of Super Ray [Sky Aluminum Co., Ltd., trade name], and the thickness is 0.03
mm aluminum foil and a 4 mm-thick foamed polyurethane heat insulating material layer are sequentially stacked to form an exterior part, and the far infrared radiator layer of the exterior part is extended over the entire outer surface of the bottom of the coffee pot. Covered. Coffee with a predetermined liquid temperature (measured values shown in Table 1) is put in this pot, and the heater surface on which the pot is placed is 110 ° C.
The temperature was adjusted to (low temperature), 140 ° C. (medium temperature) and 160 ° C. (high temperature), and the plate was placed for a predetermined time (time is shown in Table 1).
Under such conditions, changes in liquid temperature and decrease in liquid amount were measured, and sensory tests were performed for changes in taste and aroma. In addition, although the pot lid was used all over, the influence of the case in which the aluminum foil of the far infrared reflecting plate was laminated on the back surface thereof and the case where it was not laminated was also examined. On the other hand, as a comparative example, the same measurement and sensory test as those of the example were carried out for a pot having no exterior part according to the present invention. The results are shown in Table 1.

[0026]

[Table 1]

As can be seen from Table 1, in the case where the far-infrared radiator layer is provided on the exterior portion and the bottom portion according to the present invention, the change in the liquid temperature near the set temperature is compared with the conventional one in which nothing is provided. Was extremely small, there was almost no decrease in liquid volume, and changes in coffee taste and aroma were very small. When the aluminum foil is laminated on the lid, the temperature change of coffee is very slow. The reason why the decrease in the liquid amount is hardly seen is not clear, and it is considered that it is related to the heating mechanism by far infrared rays. Comprehensively looking at the results of the measurement and sensory test in Table 1, when the coffee pot and the heating adjustment stand according to the present invention are used, compared with the case where the conventional coffee pot is heated by a normal heater, It can be seen that the excellent effect is exhibited in terms of.

[0028]

The coffee pot of the present invention has a far-infrared radiator layer as the innermost layer on the outside of its side surface, and is provided with a far-infrared reflecting layer and a heat insulating material layer in that order. By receiving the heat, it becomes possible to avoid overheating from the bottom surface of the pot for maintaining the desired temperature of the coffee contained in the pot. Further, in the above structure, the far-infrared radiator layer is further extended on the outer surface of the bottom of the pot so that the far-infrared radiator layer is completely covered to prevent radiation cooling when the pot is lifted by the pedestal, and to further improve the effect. did it. Further, by providing a far-infrared reflective layer on the back surface of the pot lid, the heat retention effect was improved. Based on these effects, we succeeded in maintaining the coffee temperature as constant as possible, preventing the decrease in liquid volume due to water evaporation, and preventing changes in coffee taste and aroma.

[Brief description of drawings]

FIG. 1 is a vertical cut end view of an example of a coffee pot of the present invention.

FIG. 2 is a plan view of an example of a heating adjustment stand according to the present invention.

FIG. 3 shows a case where the gantry shown in the cut end view along the central axis of FIG. 2 is placed on a heater.

FIG. 4 shows a state in which the bimetal structure portion is deformed when the heater temperature rises.

FIG. 5 shows a state in which a bimetal structure portion is deformed when the heater temperature rises.

FIG. 6 is a perspective view showing an example in which a notch is provided in the exterior portion of the present invention.

[Explanation of symbols]

1: Coffee pot 2: Far-infrared radiator layer 2a: Part of the far-infrared radiator layer on the side of the coffee pot 2b: Part of the far-infrared radiator layer on the bottom of the coffee pot 3: Far-infrared reflection Layer 4: Thermal insulation layer 5: Decorative cover 6: Exterior part 7: Mouth part 8: Lid 8a: Air vent hole 9: Far-infrared reflective layer 9a: Air vent hole 10: Handle 11: Heater 12: Stand 13: Notch A: Metallic annular plate B: Metallic disc C: Annular heat insulating material

Claims (7)

[Claims] 1. A coffee pot having a far-infrared radiator layer as an inner layer, and an exterior portion in which a far-infrared reflecting layer and a heat insulating material layer are sequentially provided on the outside of the side surface. 2. A far-infrared radiator layer is provided as an inner layer on the outside of the side surface, and an exterior portion in which a far-infrared reflecting layer and a heat insulating material layer are sequentially provided is provided, and the far-infrared radiator layer extends to the entire outside of the bottom surface. Coffee pot characterized by. 3. The coffee pot according to claim 1, wherein the far-infrared radiation layer is made of a far-infrared radiation material made of an aluminum alloy having an anodized film on at least its inner surface. 4. The coffee pot according to claim 1, wherein an aluminum foil is used for the far infrared ray reflection layer. 5. A far infrared reflecting layer is provided on the inner surface of the lid.
Or the coffee pot according to 2. 6. The coffee according to claim 1 or 2, wherein a notch for confirming the liquid level in the pot is provided in a part of the exterior part composed of the far infrared radiator layer, the far infrared reflection layer and the heat insulating material layer. pot. 7. A pedestal interposed between the coffee pot according to any one of claims 1 to 6 and a heater on which the coffee pot is placed, is a metal disc having a uniform coefficient of thermal expansion, and is provided on the outer periphery thereof. It is integrated through the formed annular heat insulating material,
A coffee pot heating adjustment stand, which is a plate-shaped body composed of an annular plate formed of a bimetal plate made of a laminated plate of two kinds of metals having different thermal expansion coefficients.